APA (7th ed.) Citation

Shaffer, E. (1968). The oil import program of the United States: An evaluation. F. A. Praeger.

Chicago Style (17th ed.) Citation

Shaffer, Ed. The Oil Import Program of the United States: An Evaluation. New York: F. A. Praeger, 1968.

MLA (9th ed.) Citation

Shaffer, Ed. The Oil Import Program of the United States: An Evaluation. F. A. Praeger, 1968.